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一个自定义的PHP文件命名函数 - 站长搜索
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一个自定义的PHP文件命名函数

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2014-12-11 21:06:07 转载来源: 网络整理/侵权必删

本文是一个php实现的可对上传的文件随意命名,感兴趣的同学参考下. 需求背景: 用php上传文件或进行移动等文件操作时,一般都会处理文件命名的问题,如果用原文件名称,可能会遇到文件名已经存在的情况 对付这种情况,有的做法是用时间戳对新文件进行重新命名,有的是用序号递增的方法,为了解决麻烦的操作,我在最近编写了一个frename函数,可以灵活依据自定义的规则取得上传文件的新命名,特此分享。 <?php function frename($file, $rule='{timestamp}', $force = true) { /* ----------------------- * date: 2009/8/11 * 依据命名规则取得文件的新命名,以处理上传文件等操作时遇到的文件名已存在的情况 * @parm1 $file -- 文件物理路径 * @parm2 $rule -- 命名规则, 默认为时间戳 * @parm3 $force -- 是否强制命名,如果是强制,就算该目标文件不存在也会对其进行命名,默认强制 * retru

本文是一个php实现的可对上传的文件随意命名,感兴趣的同学参考下.

需求背景:

用php上传文件或进行移动等文件操作时,一般都会处理文件命名的问题,如果用原文件名称,可能会遇到文件名已经存在的情况
对付这种情况,有的做法是用时间戳对新文件进行重新命名,有的是用序号递增的方法,为了解决麻烦的操作,我在最近编写了一个frename函数,可以灵活依据自定义的规则取得上传文件的新命名,特此分享。


<?php
function frename($file, $rule='{timestamp}', $force = true) {
/* -----------------------
* date: 2009/8/11
* 依据命名规则取得文件的新命名,以处理上传文件等操作时遇到的文件名已存在的情况
* @parm1 $file -- 文件物理路径
* @parm2 $rule -- 命名规则, 默认为时间戳
* @parm3 $force -- 是否强制命名,如果是强制,就算该目标文件不存在也会对其进行命名,默认强制
* retrun str -- 依据$rule命名的新文件路径
* 示例:
echo '默认规则(时间戳):' . frename(__FILE__);
echo '<br />序号递增规则:' . frename(__FILE__, '{name}{n}');
echo '<br />n个前导0的序号递增规则:' . frename(__FILE__, '{name}{5n}');
echo '<br />用分隔符<span style="color: #E00;">_</span>并带有3个前导0的序号递增规则:' . frename(__FILE__, '{3n}<_>{name}');
echo '<br />使用时间日期元素组合的规则:' . frename(__FILE__, '{y}_{m}_{d}_{h}_{i}_{s}');
echo '<br />使用简写形式的时间日期元素组合的规则:' . frename(__FILE__, '{Y}_{M}_{D}_{H}_{i}_{s}');
echo '<br />其他自定义组合:' . frename(__FILE__, '{timestamp}_{name}<_>{n}');
----------------------- */
if (!$force && !file_exists($file)) return $file;
$filename = basename($file);
$path = str_replace($filename, '', $file);
$suffix = substr($filename, strrpos($filename, '.'));
$name = str_replace($suffix, '', $filename);
$timestamp = time();
list($y, $Y, $m, $M, $d, $D, $h, $H, $i, $s) = explode(',', date('Y,y,m,n,d,j,h,G,i,s'));
$tempname = str_replace(
array('{name}', '{timestamp}', '{y}', '{Y}', '{m}', '{M}', '{d}', '{D}', '{h}', '{H}', '{i}', '{s}'),
array($name, $timestamp, $y, $Y, $m, $M, $d, $D, $h, $H, $i, $s),
$rule
);
if (preg_match('/{(d?)n}/', $rule, $n)) {
preg_match('/<([^>]+)>/', $tempname, $sep);
$file = $path . str_replace(array($n[0], $sep[0]), array('', ''), $tempname) . $suffix;
if (!file_exists($file)) return $file;
$tempname = str_replace($sep[0], $sep[1], $tempname);
$tname = $tempname;
$i = 1;
do {
$nn = sprintf("%0{$n[1]}s", $i);
$tempname = str_replace($n[0], $nn, $tname);
$file = $path . $tempname . $suffix;
}
while (file_exists($file));
return $file;
} else {
$file = $path . $tempname . $suffix;
if (file_exists($file)) return false;
else return $path . $tempname . $suffix;
}
}
echo '默认规则(时间戳):' . frename(__FILE__);
echo '<br />序号递增规则:' . frename(__FILE__, '{name}{n}');
echo '<br />n个前导0的序号递增规则:' . frename(__FILE__, '{name}{5n}');
echo '<br />用分隔符<span style="color: #E00;">_</span>并带有3个前导0的序号递增规则:' . frename(__FILE__, '{3n}<_>{name}');
echo '<br />使用时间日期元素组合的规则:' . frename(__FILE__, '{y}_{m}_{d}_{h}_{i}_{s}');
echo '<br />使用简写形式的时间日期元素组合的规则:' . frename(__FILE__, '{Y}_{M}_{D}_{H}_{i}_{s}');
echo '<br />其他自定义组合:' . frename(__FILE__, '{timestamp}_{name}<_>{n}');
?>

标签: 一个 自定义 PHP 文件 命名 函数


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